Fig. 3
From: The effects of emotional arousal on pupil size depend on luminance
Group results for IADS. (a) Mean pupil size in the Negative and Neutral condition, collapsing across luminance. Each point on the graph represents an individual subject. Overall larger pupil size was observed in the Negative condition compared to Neutral condition. (b) Group-level mean pupillary light reflex functions for the Negative and Neutral condition, fit with the modified decrement Naka-Rushton function. Error bars represent SEM. (c) The group-average difference in pupil size between the Negative and Neutral conditions was tested separately at each of the ten luminance levels. The shaded gray area represents the 95% confidence interval. (d) Bootstrapped distributions (2000 iterations) of the difference between Negative and Neutral parameter estimates for Pmin, L50 and Pmax. The dotted line indicates no difference in the Negative and Neutral parameter estimates. (e) Scatterplot of individual observer parameter estimates comparing Neutral versus Negative for Pmin (minimum pupil response), L50 (inflection point), and Pmax (maximum pupil response). The purple dot indicates the group-averaged parameter estimates, with the error bars indicating the SEM. The dotted line indicates the unity line of no difference in parameter estimates between the Negative and Neutral conditions.
